High-efficiency and energy-saving scr denitrification catalyst regeneration and disposal process and device

Abstract

The invention provides and designs a disposal technology and device for disposing SCR denitration catalyst regeneration in a factory. The technology comprises the steps that each working procedure of actual operation is executed starting from the procedure that an SCR catalyst module is conveyed to the factory, detection, carrying, flying ash removal, washing, acid pickling, rinsing, air drying, activation, drying, calcination and finished product packaging are performed; according to the technological process and disposal time of each working procedure, equipment is reasonably arranged, the carrying time is shortened, the number of links is reduced, time is reasonably utilized, and the production efficiency is improved; each disposal cell body is reasonably designed, control equipment is configured, a PLC control system is used, and disposal cell bodies are automatically operated, semi-automatic control over the overall disposal technology is achieved, and efficiency and disposal capacity are further improved; some water used by the technology is subjected to sedimentation, filtering and reutilization, and the cost and resources are saved; calcination and drying of a module are effectively combined together, the module is dried by means of waste heat of calcination, and energy sources are effectively saved.

Description

technical field [0001] The invention relates to the field of engineering technology and equipment design and manufacture of denitrification catalyst regeneration for large coal-fired boilers, in particular to a regeneration process and regeneration device for a vanadium-titanium-based selective catalytic reduction (SCR) denitrification catalyst. It is used to improve the regeneration efficiency of the denitrification catalyst during the regeneration process of the factory, and save energy and resources while ensuring the regeneration quality and improving the efficiency of the regeneration device. Background technique [0002] With the rapid development of our country's economy and the improvement of people's living standards, people pay more and more attention to environmental protection issues; our government has also become more and more strict on environmental protection requirements. The newly implemented "Emission Standards for Air Pollutants from Thermal Power Plants" ...

AI Technical Summary

Problems solved by technology

At present, the most widely used and mature denitrification technology is selective catalysis (SCR) denitrification technology, of which vanadium-titanium-based denitrification catalyst is the most used. In the whole denitrification system equipment, the core components of the catalyst account for the largest proportion of equipment investment, and the equipment is in operation. After a period of time, due to the pollution of alkaline metals and arsenic in the flue gas; the adhesion, blockage and erosion of coal ash after combustion; mechanical wear and tear, the catalyst loses its original characteristics. , its denitrification effect will not meet the design and national requirements, and it will also bring serious problems to the economic operation of the unit. The catalyst contains heavy metals, and improper management of the replaced catalyst components may cause secondary pollution. Therefore, a new industry of SCR denitrification catalyst regeneration has emerged. Because the mechanical structure of the SCR denitrification catalyst module can be used for more than ten years, only the catalyst components fail , as long as the expired catalyst is reduced, it can be reused, and the price of the regenerated catalyst is far lower than the price of the new catalyst, which not only brings economic benefits to the power plant, but also reduces and lowers the possibility of secondary pollution

[0003] At present, the SCR denitrification catalyst regeneration process device mainly performs compressed air purging, cleaning, activation and drying to complete the regeneration of the catalyst. The regeneration process takes a long time, the efficiency is low, the waste is serious, and the production process may cause secondary pollution.

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